如图,在△ABC中,∠C=90°,∠B=30°,以A为圆心,任意长为半径画弧分别交AB、AC于点M和N,再分别以M、N为圆心,大于
MN的长为半径画弧,两弧交于点P,连结AP并延长交BC于点D,若CD=3,则BD的长是( )
![](https://img.xkw.com/dksih/QBM/2019/5/28/2213280969818112/2213657852411904/STEM/d995a0cc9a224388a62d50696d7d8753.png?resizew=183)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2019/5/28/2213280969818112/2213657852411904/STEM/d995a0cc9a224388a62d50696d7d8753.png?resizew=183)
A.7 | B.6 | C.5 | D.4 |
更新时间:2017-11-18 08:18:05
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【知识点】 含30度角的直角三角形解读
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【推荐1】如图,在
中,
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A.6 | B.4 | C.![]() | D.![]() |
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【推荐2】如图,等边三角形
的顶点分别在等边三角形
的各边上,且
与E,若
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A.![]() | B.![]() | C.![]() | D.![]() |
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